#include <myheader_c_plus.h>
using std::cout;
using std::endl;
namespace wd{
    int val = 7;
    const int day = 3;
    void func(){
        cout << "hello" << endl;
    }
    void cout(){
        std::cout << "world" << endl;
    }
}//end of namespace wd
 using namespace wd;
void test (){
    std::cout << wd::day << wd::val;
    wd::func();
    wd::cout();
}
int main(int argc, char *argv[])
{
    test();
    return 0;
}

